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If you need a low voltage water pump for solar systems, this is for you. Si necesitas una bomba de agua de bajo voltaje esta es para ti.It's better than I thought, powerful, maybe useful to low cost watercooling systems.

Product of a good quality. Its price is affordable. The size of this product is small enough so that it can be placed for example in small robots. It can drive motors or other high loads thanks to the 10A relays. There is full acces to both terminals of each relay: to one that is « normally open » and to the second that is « normally closed ». This feature is not common in other boards having only normally open terminal.This board has optocouplers ensuring a good isolation between the high voltage circuit and the low voltage system circuit. This ensures safety of the projects based for example on Arduino boards and Raspberry-Pi in which I am currently using it. This is a good idea of placing LEDs indicating current status of relays. The system bus power can be separated from the relay bus power simply using a jumper.

I would like to have the 8-relay option and another version with 12V relays.

***If you try to chargue two gadgets at the same time, batteries may became hot******It works better if put two or more lithium batteries connected in parallel because increase the useful life of then***

***Good item for do you own portatile charguer for much less than buying a new one in shopping centers***

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